Shen hao hzx45 IIA/ 120 back question

Hi,
new to 4x5 photography and would like to know if the Shen hao graflok back is compatible with the graflex back?
i just ordered online a graflex "23" 6x9 120 back for 4x5 cameras and now wondering if it will fit.any one with this knowledge would be a great help. Thanks in advance.